It's possible, but you'll have to place the word you want to censor out alone in {}

Like... take dog.

if you put dog, it'll censor out dog:

dog =
doghouse = house

put {dog}, it'll only censor dog by itself.

dog =
doghouse = doghouse

of course, when you place the s-word in {} that leaves some words out in open that can be considered foul, such as ty, head, (though who'll use head anyways?) dog, etc....

Of course, it's not that bad a word as the f-word. :P

of course, I don't have a problem with it. It forces me and others to use creative substitutes.